121864471 has 4 divisors (see below), whose sum is σ = 123580944. Its totient is φ = 120148000.

The previous prime is 121864459. The next prime is 121864481. The reversal of 121864471 is 174468121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 174468121 = 2677 ⋅65173.

It is a cyclic number.

It is not a de Polignac number, because 121864471 - 2¹³ = 121856279 is a prime.

It is a super-3 number, since 3×121864471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121864481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 858130 + ... + 858271.

It is an arithmetic number, because the mean of its divisors is an integer number (30895236).

Almost surely, 2^121864471 is an apocalyptic number.

121864471 is a deficient number, since it is larger than the sum of its proper divisors (1716473).

121864471 is an equidigital number, since it uses as much as digits as its factorization.

121864471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716472.

The product of its digits is 10752, while the sum is 34.

The square root of 121864471 is about 11039.2242028143. The cubic root of 121864471 is about 495.7838426292.

The spelling of 121864471 in words is "one hundred twenty-one million, eight hundred sixty-four thousand, four hundred seventy-one".